I wonder what their plan on collecting the audio is. Android & IOS have features that tell them when the microphone is active and what app is accessing it, so I can’t imagine people won’t get rid of whatever app that is using their mic 24/7 (unless it’s some sort of rootkit that doesn’t display the mic, which would most likely have legal repercussions)
I don’t see a future (even if lots of extremely popular apps such as TikTok, Reddit, Meta’s apps, Google’s apps, ect. did it) where the majority of people would be ok with 24/7 microphone recordings being collected and sold to advertisers. Even if every major phone OS decided that they would all enable 24/7 mic recording, I would assume that alternative operating systems would become extremely popular.